Practice Interface Description (1.5.1) - Functional Programming in Java

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9 questions

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6 sample questions

Question 1.
What is a functional interface?
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Recall the definition in your readings.
Question 2.
Give an example of a predefined functional interface.
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Think about what interfaces are found in java.util.function.
3Question 3.
True or False: A functional interface can have multiple abstract methods.
- True
- False
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Think about the definition of a functional interface.
4Question 4.
Which of the following is a functional interface? A) Runnable B) Number C) Random
- Runnable
- Number
- Random
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Recall the interfaces we covered.
Question 5.
Implement a custom functional interface for a comparator, then sort an array using a lambda expression that utilizes your interface.
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Think about how to compare two values.
Question 6.
Design a functional interface that can be used for event handling in Java applications. Show its implementation in a button click action.
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How do you handle actions in Java GUI?

5 more questions in this section. Enroll free to practise them all.